... steel. 2.Noise Level Z1,Z2,Z3,Z4 3,GCR 15 GCR11 4.Certificate: TS16949. Deep groove ball bearingDeep groove ball bearing ... AISI440C, AISI304, AISI316, Ceramic7.Retainer: PTFE, Nylon, PEEK Or Stainless Steel8.Bore Size:from 1mm to 300mm9.Outside Diameter:from ... PTFE, Nylon, PEEK Or Stainless SteelLubrication: Oil,grease,dryNoise Level: Z1,Z2,Z3,Z4Type: Deep groove ball bearingPackage: Tube & Box ...